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Balance Insert Mod for Nabalis Vulp

Regular price $14.00 USD
Regular price Sale price $14.00 USD
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  • Adjust the balance of your Nabalis Vulp balisong trainer with this custom-made Zippy blade insert. The insert houses 5x removable tungsten weights which enable the Vulp trainer to have a more neutral (less handle biased) balance profile.

    Assembly Instructions

    -5x removable Tungsten weights reduce the stock handle bias and lets you adjust the balance on the Nabalis Vulp Trainer to fit your preference. The core of the mod are the 3x weights along the spine, which make it stickier on chaplins and assist the Vulp move into fans more effectively. The optional 2x "cutting edge" provide some extra tip weight for a more neutral balance, and ensure the balance remains good when using the optional Slim Caps. The weights can be popped out with a pointy rigid object and can be popped in with your thumb.

    -Fits perfectly in the Nabalis Vulp Trainer with an "edge lip" so it won't fall off on hard drops.

    -Made of a shatter-proof rubbery polyurethane.

    -Add-on optional Zippy Slim Caps for only $5 (30% Discount) to protect the handles of the Vulp and add color.

    -The Zippy Insert Mod adds 0.166 oz with all 5x weights, bringing the Vulp weight from 3.87 oz to 4.036 oz. The slim caps add an additional 0.085 oz and bring the total weight up to 4.121 oz.

    Recommendation for Usage and Balance Configurations:

    The core of the mod is the 3-ball “Spine” insert. The stock Vulp blade has a lot of forward weight due to the Bowie shape of the blade (all the spine weight is close to the tang). The 3 weights in the spine of the blade even out the weight distribution of the stock blade. The extra spine weight makes moving into fans easier and chaplins more controlled, as well as making the balance more neutral. The 3-ball spine insert is the core of the mod for those reasons.

    In contrast, the 2 “edge weights” are strictly optional. They are for people who want to experiment with more tip weight or to balance out the weight when using Slim/Weight caps with the Vulp. Consequently, my recommended balance configurations for the Vulp with this Zippy insert mod is:

    • 3  weights in the spine insert, 0 weights in the edge insert, and no handle caps.

    • 3 to 5 weights with either Slim or Weight caps.

Customer Reviews

Based on 49 reviews

OMG! These inserts, ball weights & endcaps elevated the already good Vulp performance, with slightly more satisfying mass. This weighs 4.13 oz. Total now! ‘Loved how you can color coordinate the cushioned end caps, with the blade inserts!
Get these for sure!

Kelly Prewitt
Made this such a better flipper

They look great and fix the extreme handle bias on the Vulp. Love it!!

Aaron. L
simply amazing

its easy to insert had a fast delivery and a super friendly support.

the addon is nice and customizable with the wighted pearls leading to satisfying any personal preference to where the blade should be wighted.

Very much worth it 👍

I grew out of the Vulp's stock balance and didn't really enjoy flipping it. That was until I picked up these inserts. I actually enjoy flipping the Vulp now. Great product.


Make me Chaplin pro style😎

Product Information

International shipping

International Shipping

Zippy ships international, but the buyer accepts the risk for lost, damaged, or seized packages-it is the customer's responsibility to comply with all local laws and regulations when importing and using this product. It is the customer's responsibilities to be aware of all import requirements when ordering, including but not limited to paying customs/import/duty fees. All international customers: it is your responsibility to looking up your country's customs requirements when you order to ensure you are in compliance, and interface with your country's customs and pay all associated fees if necessary.

For EU customers, be advised that customs will apply a VAT fee of approximately 30€ for importing products that exceed 100€. This is subject to change depending on up-to-date EU regulations; it is the customer's responsibility to verify this at the time of your purchase.

For questions and concerns (looking at you, Aussies), please contact me at If the Zippy is shipped in 2 packages, you will need to assemble the trainer following these instructions:

Zipper Assembly

Cycloid Assembly

My package hasn't arrived, or my package is lost; what should I do?

Noooooo! Don't panic yet. So far I've never actually had a package get lost in the mail, although delays with USPS aren't unheard of, especially if the shipping is international. If you're a US-customer and your package is lost in the mail, appears lost in the mail, or was marked delivered but wasn't actually delivered, call the USPS immediately (1-800-275-8777)**. The faster they get on the case, the more likely you'll reach a timely resolution and get your Zippy ASAP. You can email me about it, but once I ship it out, I don't have access to any additional information that you don't--I'm just going to refer you to call the shipping carrier for resolution.

**Some tips when calling USPS:
(1) Do not use speakerphone, as this will confuse the automated system.
(2) From the automated menu, say "Package," and follow the prompts with your tracking number.
(3) When it offers "visual mode," I recommend you use it. It's faster and more streamlined.
(4) At the end of the automated system which will track your (delayed) package, say "agent" or "representative" so you can speak to an agent and explain the issue.
(5) Sometimes they only allow the sender to open an investigation. If that's the case, shoot me an email asking for the shipping label, and then use the return address information on the shipping label to provide the sender information.

If you are an international customer and your package hasn't arrived yet, contact your local postal service that interfaces with USPS to evaluate the situation--worst case scenario you may need to reach out to customs to see if your package made it through or was seized. It is the customer's responsibility to comply with all local laws and regulations when importing my products.

Hopefully your package is just delayed (this has always been the case historically when a package appears lost), but if it is actually lost in the mail, I'm very sorry. Believe it or not, it's just as heartbreaking for me as it is for you, since I make every balisong myself and put a lot of love into each one. Unfortunately, I am unable to take responsibility for packages that get lost in the mail (or seized by customs). I offer a variety of shipping options which have different levels of pricing and reliability/risk, and it's up to you to choose what is best for you. I am unable to replace lost packages for free, since each product takes me a considerable amount of time and financial investment to make; I'm not a big Amazon company that manufactures their stuff overseas. Thank you for understanding.

Warranty & Returns


If part of the Zippy breaks within 1 year of purchase and it affects functionality, I will replace it for free. Contact me at

In order to qualify for this policy, the issue must affect the function of the balisong. Normal wear and tear (including scratches and dings caused by repeated impact) is not covered by this warranty unless it affects the functionality of the balisong or I determine it to be the result of a manufacturing defect. In order to reduce cost for the customer, the Diode is not covered under the Zippy Warranty. Replacement Diode parts can be purchased here.

Worn M2 x 0.4mm nylock nuts are consumables and should be replaced from time to time if you disassemble frequently--these are not covered by the warranty.

Returns & Order Cancellation

I do not accept returns or refunds. All orders are final. Packages that are delayed or lost in the mail are not my responsibility. Many of my products are made-to-order and by the time you contact me to cancel, I may have already begun working on your parts. I am a one-man operation and returns are far too time consuming and costly to deal with. I appreciate you supporting my small business.


By using this website and/or purchasing any Zippy Balisong LLC products from this website or other sources, you agree to abide by all of the following terms and conditions:


Zippy Balisong LLC modifications are aftermarket mods that the customer installs themselves. The mods do not include a knife or trainer, and it is the customer's responsibility to follow the assembly instructions (listed on each product page) when installing the aftermarket Zippy mods. If you have any questions during the assembly process whatsoever, do not hesitate to contact me for clarification ( Improper installation can lead to property damage and injury, and the onus is on the customer to abide by safe practices when assembling and using these products--any injuries or damage to the customer's knife/trainer or other property during the assembly process or use of the balisong is the responsibility of the customer. Balisongs (whether trainers or knives with a sharp edge) carry inherent risks, and it is the customer's responsibility to operate all Zippy-modded balisongs in a safe and responsible manner to themselves, and everyone around them, including pets and property. To ensure safety, the customer must verify proper hardware tightness (including threadlock and installation), structural integrity of the balisong and all installed mods, and function of the balisong and all modifications prior to each use. It is the customer's responsibility to read the entire product description for each Zippy product they use to ensure they are using the product within recommended guidelines (for example, per the product desccription: the ZippyLucha should not be used at a functional work knife or manipulated over hard surfaces such as concrete). It is the customer's responsibility to comply with all international, federal, and local laws and regulations when importing and using these products.

Zippers, Cycloids, and Diode's are not real knives. These products are balisong trainers, not real knives. The blades are made of plastic, weighted with tungsten. This is not a weapon or a cutting tool and is used for recreation and training only. It is the customer's responsibility to comply with all international, federal, and local laws and regulations when importing and using these products.

You agree to not copy, modify, creative derivate works of, or reverse engineer, in whole, or in part, for any purpose: Zippy's website, products, and intellectual property, including concepts, prototypes, all products, designs, text, and photographs.

Privacy Policy

When purchasing products, you agree to provide accurate information (name, contact method such as email, address, credit/debit card information, and other information. Zippy Balisong LLC reserves the right to request identification following payment to verify your identity and prevent fraud. Zippy Balisong LLC will not sell your personal information to third parties. Zippy Balisong LLC will not share your personal information with third parties without your permission except in response to inquiries by law enforcement and government agencies, or if I have reason to believe your use of the website and purchase of products is for an unlawful purpose. These cases that do not require your consent to share data consist of: court order, a subpoena, legal process, governmental request, or to investigate fraud.